I. Choose the correct option.

When were rockets invented?
1. 1230 AD
2. 1231 AD
3. 1950 AD
4. 1232 AD
Who invented the rockets?
1. Chinese
2. Americans
3. Indians
4. Australians
The study of stars, planets, comets etc.,is known as
1. Astrology
2. Astrophysics
3. Astronomy
4. Astrobiology
A collection of billions of stars held together by a force is a
1. galaxy
2. black hole
3. supercluster
4. comet
Our solar system resides in _____ galaxy.
1. Milky way
2. Andromeda
3. IC 1101
4. M 87